The effect of chemical additives on the synthesis of ethanol

Technical Report · Wed Aug 30 04:00:00 EDT 1989

DOI:https://doi.org/10.2172/7205411· OSTI ID:7205411

Chuang, S S.C.

The objective of this research is to elucidate the role of various chemical additives on ethanol synthesis over Rh- and Ni-based catalysts. Chemical additives used for this study will include S, P, Ag, Cu, Mn, and Na which have different electronegativeities. The effect of additives on the surface state of the catalysts, heat of adsorption of reactant molecules, reaction intermediates, reaction pathways, reaction kinetics, and product distributions is/will be investigated by a series of experimental studies of NO adsorption, reactive probing, steady state rate measurement, and transient kinetic study. CO insertion is known to be a key step to the formation of acetaldehyde and ethanol from CO hydrogenation. Reaction of ethylene with syngas is used as a probe to determine CO insertion capabilities of metal catalysts. During the sixth quarter of the project, the mechanism of CO insertion on Ni/SiO{sub 2} was investigated by in-situ infrared spectroscopy. Ni/SiO{sub 2}, a methanation catalyst, has been shown to exhibit CO insertion activity. In situ infrared studies of CO/H{sub 2} and C{sub 2}H{sub 4}/CO/H{sub 2} reactions show that the carbonylation of Ni/SiO{sub 2} to Ni(CO){sub 4} leads to an inhibition of methanation in CO hydrogenation but an enhancement of formation of propionaldehyde in C{sub 2}H{sub 4}/CO/H{sub 2} reaction. The results suggest that the sites for propionaldehyde formation is different from those for methanation.

• Research Organization: Akron Univ., OH (United States). Dept. of Chemical Engineering
• Sponsoring Organization: DOE; USDOE, Washington, DC (United States)
• DOE Contract Number: FG22-87PC79923
• OSTI ID: 7205411
• Report Number(s): DOE/PC/79923-T14; ON: DE92018892
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010408* -- Coal
Lignite
& Peat-- C1 Processes-- (1987-)
ADDITIVES
ALCOHOLS
CATALYSTS
CATALYTIC EFFECTS
CHEMICAL PREPARATION
CHEMICAL REACTIONS
CONVERSION
DOCUMENT TYPES
ELEMENTS
ETHANOL
FLUIDS
GASES
HYDROCARBONS
HYDROXY COMPOUNDS
METALS
METHANATION
ORGANIC COMPOUNDS
PLATINUM METALS
PROGRESS REPORT
RHODIUM
SILVER
SPECIFICITY
SYNTHESIS
SYNTHESIS GAS
TRANSITION ELEMENTS